Those colonies that do not wish to break away from their Sovereign Country generally have some unspeakable concerns, such as the United Kingdom's colony in South Africa.
The main reason why the South Africa colony does not, like Canada and Australia, seek political equality or even independence is that South Africa needs the United Kingdom's military protection.
The two major ethnic groups in South Africa—the British and the Boer People—have, due to the impact of the South African Wars in the last century, never relaxed their vigilance toward East Africa.
Moreover, economically, South Africa today no longer has the confidence to stand alone as it did in the previous timeline. In that former world, South Africa possessed the rich mineral resources of the Northwest Region and its economy developed quite well.
